i have a 1999 chevy malibu with a 3100 motor and the antifrezze comes out of the overflow hose sometimes .?

Question

replaced rad cap and flushed system.it comes out after a good drive or when it sits at idle sometimes

Answer 1

your thermistat is broken,...replace it

Answer 2

THE REAL QUESTION IS, DOES THE CAR OVERHEAT? Most cars usually overflow a little bit when they idle for too long. If its a lot of fluid, its bad...if its just a little, its normal. The overflow canister is designed to let the fluid back into the radiator after it cools.